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(No Model.)-

2 Sheets-Sheet 1. G. R. ALLEN, WAX THREAD SEWING MACHINE. No. 510,951.Patented Dec. 19, 1893.

(No Model.) 2 Sheets-Sheet 2.

- G. R. ALLEN.

WAX THREAD SEWING MACHINE.

No. 510,951. Patented Dec. 19, 1893.

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WASHINGTON, n. c.

UNITED STATES PATENT @rrrcs.

GEORGE RICHARD ALLEN, OF BUFFALO, NEW YORK, ASSIGNOR OF ONE- HALF TOCHRISTIAN M. SCHMITT, OF SAME PLACE.

WAX-TH READ SEWI NG"- MACl-IINE.

SPECIFICATION forming part of Letters Patent No. 510,951, dated December19, 1893.

1 Application filed October 19, 1891- Serial No. 4-0Qd96- (No model.)

To all whom, it may concern:

Be it known that I, GEORGE RICHARD AL- LEN, a citizen of the UnitedStates, residing at the city of Buffalo, in the county of Erie and Stateof New York, have invented new and useful Improvements in Wax-ThreadSewingldachines, of which the following is a specification.

This invention relates to wax-thread sewing machines, and moreespecially to machines of this class which are provided with a horn anda hollow driving shaft which incloses the steam pipes leading to andfrom the horn.

The objects of my invention are to facilitate the removal andreplacement of the steam pipes in making repairs and to improve the-construction of the steam head with which the steam pipes of the hornand wax pot are connected.

In the accompanying drawings consisting of two sheets:liigure l is afront elevation of my improved machine with the sewing mechanismomitted. Fig. 2 is a horizontal sectionthereof, in line 1 -1, Fig.1.Fig. 3 is an enlarged sectional elevation of the horn,-the hollow shaftand adjacent parts. Fig. 4c is a vertical section, on an enlarged scale,of the steam head at the upper end of the hollow shaft. Fig. 5 is ahorizontal section thereof, in line 2*2, Fig. 4.. Fig. 6 is an interiorview of thehorn. Fig.7is a face View of the steam chamberlocated in thehorn. Fig.8 is a cross section of the horn in line 3-3, Fig. 8. Fig. 9is a side elevation of one of the couplings at the lower ends of thesteam supply and return pipes of the horn. Fig. 10 is a longitudinalsection in line 4;4,Fig. 9. Fig. 11

is a horizontal section in line 55, Fig. 3, o an enlarged scale. Fig. 12is a sectional elevation of the hollow driving shaft of the machine,showing the manner of securing the gear wheels thereto. 1

Like letters of reference refer to like parts in the several figures.

A. represents the frame of the machine which is substantially of theform found in the well-known McKay machine, and B is the horn which iscapable of turning in the usual manner. The sewing mechanism whichcooperates with the whirl in the tip of the horn is not shown in thedrawings and forms no part of my invention.

The upright shank B'of the horn is hollow and turns with its upperportion in a bearing b arranged in the upper cross piece A of the frame,the shank being provided with a supporting flange 1) which rests uponthe top of the bearing b. The lower end of the hollow' shaft is providedwith a sleeve or bushing C which turns in a bearing 0 at the upper endof a bridging frame D. This frame is bolted at its sides to the legs ofthe main frame A, as shown in Fig. 1.

E represents the hollow shaft arranged within the hollow horn-shank andturning with its upper end in a bearing e arranged within the hollow armA of the horn and with its lowerend in the sleeve or bushing C.

F is the gear wheel secured to the lower end of the hollow shaft andwith which the usual gear segment f meshes, whereby the shaft isalternately rotated in opposite direc tions, in a common manner.

G is the bevel wheel secured to the upper end of the hollow shaft, 9 thewhirl-shaft journaled in the horn'and g the shaft through which motionis transmitted from the hollow shaft to the whirl-shaft by bevel gears.The gear wheels F and G are provided with internally screw-threadedbores which engage with external right-hand threads g on the endportions of the hollow shaft and the wheels are reliably secured to theshaft by clamping nuts applied to left-hand threads g? on the ends ofthe shaft, as shown in Fig. 12. By this construction, loosening of thegear wheels is impossible, as any retrograde movement of the gears tendsto tighten the clamping nuts and more firmly bind the wheels upon theshaft. p

h is the ascending steam supply pipe extending through the hollow shaftE, and h the descending return pipe surrounding the inner supply pipeand separated therefrom by an annular steam space or passage. The 5 twopipes h 71. extend below the lower end of the hollow shaft.

I is a steam inlet chamber supported upon the lower portion of thebridging frame D and with which the open lowerend of the innersuptoo plypipe h communicates. Steam is supplied to this chamber from anyavailable source by a pipe t'. The lower end of the outer return pipe his closed by a plug, as shown, to exclude the steam in the inlet chambertherefrom. This plug is brazed or otherwise secured to both of thesepipes, so as to firmly connect them together. The pipes h h enter thetop of the inlet chamber through a stuffing box or gland 1; whereby areliable joint is, formed at this point.

J is a steam exit chambersecured to the bridge frame D above the steaminlet chamber and through which the supply and return pipes h it pass.

jj are stufling glands or boxes arranged respectively at the upper andlower ends of the exit chamber and whereby a closejoint is producedaround the outer return pipe. Steam passes from the annular spacebetween the supply and return pipes h h into the exit chamber throughopenings 71 formed in the return pipe, as clearlyshown in Figs. 3 and11. The waste steam is conducted from the exit chamber to a suitableplace of discharge by apipe is.

L is a steam-head or manifold supported upon the arm B of the horn, soas to move therewith, and in which the upper portions of the supply andreturn pipes h h are arranged. This head consists of a cylindricalchamber resting with its lower open end upon a base Z secured to the armof the horn by bolts or screws, the base being provided in its upperside with an annular groove or depression Z in which the lower flangedend of the head L is seated, and with an externally screw-threadednipple Z which engages with the internally threaded lower end of thehead.

m is a sleeve or bushing arranged in the nipple Z and surrounding theouter return pipe h This bushingis provided at its lower end with aflange m which bears against the under side of the base Z and its upperend is externally threaded to receive a screw cap m which bears againstthe upper end of the nipple Z so as to retain the bushing in place.Packings are interposed between the lower end of the steam head L andthe groove of the base Z and between the cap m and the upper end of thebushing m. This construction forms a very tight and reliable .jointwhich effectually prevents leakage of steam through the bottom of thesteam head or between the hollow shaft and the bushing m. The returnpipe 72. communicates with the interior of the steam head L by openingsn formed in the pipe within the chamber of the head. As more clearlyshown in Fig. 4:, the steam head is provided at its upper end with astuffing box N through which the upper end of the return pipe h passesand whereby a tight joint is formed around said pipe whereby leakage ofsteam between the pipe and the head is prevented. The return pipe isclosed at its upper end bya plug N which is I secured to the upper endof the supply pipe h by brazing or otherwise. By firmly uniting thesteam supply and return pipes,'they can be together withdrawn from thehollow shaft, for making repairs, upon detaching the steam head from thehorn and disconnecting the branch pipe from the upper end of the steamsupply pipe. This construction facilitates the removal and replacementof these pipes, as the inner pipe is carried by the outer pipe and doesnot therefore require separate fitting.

O is the pot containing the melted wax and which is provided with theusual steam or heating chamber 0, the interior of which is divided by adiaphragmi'nto communicating compartments through which steam iscirculated.

p is a branch pipe connected with the upper end of the steam supply pipeh by asuitable coupling, as shown in Fig. 4, and leading to the steamchamber-of the wax pot ;.and 10' is a pipe leading from the wax pot tothe direct pipe q of the horn. The pipe q supplies steam to atrough-shaped chamber Q arranged in the horn near its tip.

q is the return steam pipe of the horn connected with the chamberQ and gis abranch pipe which leads from the return pipe qtoa nozzle 1' of'thesteam head L, which nozzle communicates with the internal chamber ofsaid head. The trough-shaped chamber Q is secured within the cavity ofthe horn by screws arranged in openings in the walls of the horn, asshown in Fig. 8.

s is an auxiliary branch pipe connected to a nozzle 8' arranged on thehead L, diametrically opposite the nozzle 1', and leading to the steamchamber of the wax pot. This auxiliary pipe and the chamber 10'connected with the direct pipe of the horn, are provided with stop cocks8 so that in case the horn becomes too hot, the steam supply may be shutoff therefrom by closing the cock of the pipe 19'.

When the supply to the horn is thus shut 0d, the cock of theauxiliarypipe is opened, to allow the steam, after circulating through the waxpot, to return directly to the steamheadL. After the head L has beenrepeatedly screwed upon the nipple land removed therefrom, for renewingits packing or for other purposes, the threads become more or less worn,so that upon tightening the head its nozzles do not always coincide withthe position of the pipes, but occupy aposition onone side thereof,necessitating either a partial unscrewing of the head, which produces aleaking joint, or else undue bending of the pipes in order to connectthem to the nozzles. To overcome this difficulty, the head L is providedbetween the nozzles r, s with duplicate steam nozzles it which areadapted to receive the ends of the steam pipes g and s in case the otherset of nozzles are out of register there with, after tightening thehead. By provid ing the head with duplicate or manifold nozzles, two ofthe nozzles will always coincide approximately,if not exactly, with thesteam pipes upon tightening the head, thus enabling the pipes to beconveniently connected to the head without excessively bending the sameor producing a loose joint of the head. The unused nozzles are closed byplugs or caps to prevent the escape of steam through the same.

In the normal position of the parts, the cock of the pipe 19' is openand that of the auxiliary pipe 3 is closed. The steamentering the inletchamber I ascends through the inner supply pipe h and passes from thelatter through the pipe 13' and the heating chamber of the wax pot andthence through the pipe q into the heating chamber Q of the horn, whenceit returns through the pipes q, g and outer pipe h into and through theexit chamber. When it is desired to cut oii the steam from the horn andsupply it only to the wax pot, the cock of the auxiliary pipe 8 isopened and the cock of the pipe 10 is closed, as before described.

I claim as my invention- 1. The combination with the stationary frame ofthe machine, the movable horn and the mechanism for operating its whirl,of the hollow driving shaft connected with said mechanism, a steam headsupported on the horn, steam inlet and discharge chambers supported onthe stationary frame, a steam supply pipe arranged within said hollowshaft and terminating with its open lower end in said inlet chamber andextending with its upper portion through said steam head, and a returnpipe surrounding said supply pipe, closed at both ends and secured atits ends to the adj acent ends of the supply pipe and provided withinsaid discharge chamber and steam head with lateral ports or passageswhereby it communicates with said chamber and head, substantially as setforth.

2. The combination with the stationary frame of the machine, the movablehorn and the mechanism for operating its whirl, of the hollow drivingshaft whereby said mechanism is actuated, steam supply and return pipesarranged in said hollow shaft, steam inlet and outlet chambers withwhich said pipes respectively communicate, a steam head or chambersurrounding the upper portion of said steam pipes and having a baseprovided with a screw-nipple which engages with the screw threaded lowerend of the steam head, a sleeve or bushing surrounding the outer steampipe and havinga flange bearingagainst the under side of the base of thesteam, head, anda cap applied to the upper end of said bushing andbearing against the screw nipple of the base, substantially as setforth.

3. The combination with the stationary frame of the machine, the movablehorn having a heating chamber and the wax pot, of a main steam supplypipe, a steam head mounted on the arm of the horn, a pipe connecting theheating chamber of the waxpot with said main supply pipe, a direct pipeconnecting the steam chamber of the horn with the cham ber of the waxpot and having a stop cock, a return pipe leading from the chamber ofthe horn to said steam head, and an auxiliary return pipe connecting theheating chamber of the wax pot with said steam head and having a stopcock, substantially as set forth.

W'itness my hand this 10th day of October,

GEORGE RICHARD ALLEN. Witnesses: i

CHRISTIAN M. SCHMITT, CARL F. GEYER.

